Question

An alloy of copper and zinc contains $65\%$ of copper.The weight of zinc in $3.6kg$ of alloy is

• A. 1.26 kg
• B. 2.72 kg
• C. 2.34 kg
• D. 1.56 kg

Answer 1

The correct option is A 1.26 kg

The alloy is of copper and zinc .

If copper if 65% of alloy then zinc is 35% of alloy .

Given , Alloy is of 3.6 kg

weight of zinc $=35$% of $alloy$

$=\frac{35}{100}\times 3.6kg$

$=\frac{126}{100}kg$

$=1.26kg$

So , the weight of zinc is 1.26 $kg$